如何将正确的库与GLFW链接为cmake中的外部项目？

Question

我包括这样的glfw:

ExternalProject_Add(glfw-external
  URL https://github.com/glfw/glfw/releases/download/3.2.1/glfw-3.2.1.zip
  PREFIX ${CMAKE_CURRENT_BINARY_DIR}/glfw
  INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/install
  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
)

add_dependencies(ShittyLife glfw-external)

if(UNIX)
  set(GLFW_LIB <What to put here?> libglfw3.a)
else()
  set(GLFW_LIB ${install_dir}/lib/glfw3.lib)
endif()

稍后使用GLFW_LIB变量链接lib.

它在Windows上运行良好,但在Linux上我缺少一些库.glfw网页提供了解决方案,但它们似乎都没有与ExternalProject_add的兼容性.

关于如何弄清楚所需的库是什么的任何想法,最好是以跨不同机器/发行版的方式工作？

如果它有用,这是我在尝试构建时遇到的错误:

相关位:

/usr/bin/ld: /home/molion/Desktop/ShittyLife/build/install/lib/libglfw3.a(x11_window.c.o): undefined reference to symbol 'XConvertSelection'
//usr/lib/x86_64-linux-gnu/libX11.so.6: error adding symbols: DSO missing from command line

所有的:

[ 94%] Building CXX object CMakeFiles/ShittyLife.dir/src/main.cpp.o
[100%] Linking CXX executable ShittyLife
/usr/bin/ld: /home/molion/Desktop/ShittyLife/build/install/lib/libglfw3.a(x11_window.c.o): undefined reference to symbol 'XConvertSelection'
//usr/lib/x86_64-linux-gnu/libX11.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
CMakeFiles/ShittyLife.dir/build.make:95: recipe for target 'ShittyLife' failed
make[2]: *** [ShittyLife] Error 1
CMakeFiles/Makefile2:68: recipe for target 'CMakeFiles/ShittyLife.dir/all' failed
make[1]: *** [CMakeFiles/ShittyLife.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

Answer 1

GLFW提供了一个CMake配置文件包,因此您应该使用find_package它来查找它.

但由于这只在ExternalProject_Add运行后才可用,而不是在配置时,你必须创建一个超级项目并将你自己的项目添加为ExternalProject,如下所示:

ExternalProject_Add(glfw-test
    SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src
    PREFIX ${CMAKE_CURRENT_BINARY_DIR}
    INSTALL_COMMAND ""
    CMAKE_CACHE_ARGS "-DCMAKE_PREFIX_PATH:STRING=${GLFW_INSTALL_PREFIX}/lib/cmake"
    DEPENDS glfw-external
)

用set(GLFW_INSTALL_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/glfw_install")和GLFW_INSTALL_PREFIX在GLFWs也使用ExternalProject_Add.

然后你可以使用

find_package(glfw3 REQUIRED)
find_package(OpenGL REQUIRED)

和

target_link_libraries(${PROJECT_NAME}
    glfw
    OpenGL::GL 
)

在你的项目中.

而不是使用ExternalProject你也可以遵循GLFW的建议.